网课铺 2022-10-16 12:25
第一章 单元测试
1、单选题：Which of the following belongs to continuous numerical variable?（ ）
A:gender.
B:country
C:age
D:blood type
答案: age
2、单选题：What is the range of probability P for a random event? （ ）
A:-1≤P≤0
B:P =1
C:0≤P≤1
D:-1≤P≤1答案: 0≤P≤1
3、单选题：Which of the following cannot be avoided during sampling? （ ）
A:sample size is too small
B:personal error
C:sample size is too large
D:sampling error
答案: sampling error
4、单选题：Low, median and high belong to _____? （ ）
A:Raw data
B:Ordering data
C:Measuring data
D:Counting data
答案: Ordering data
5、单选题：Which of the following belongs to discrete numerical variable ________? （ ）
A:Weight
B:Number of children in a family
C:Height
D:Cancer degree
答案: Number of children in a family
6、单选题：Which one of the following variables is not categorical? （ ）
A:Age of a person.
B:Gender of a person: male or female.
C:Choice on a test item: true or false.
D:Marital status of a person (single, married, divorced, other)
答案: Age of a person.
7、单选题：Which of the following belongs to the measurement data ________. （ ）
A:WBC counts
B:gender
C:blood type
D:curative effect
答案: WBC counts
8、单选题：Which of the following belongs to categorical variable ________. （ ）
A:gender of people in a specific region.
B:heart rate
C:score of IQ
D:days staying in hospital
答案: gender of people in a specific region.
第二章 单元测试
1、单选题：The measure of dispersion most commonly used in conjunction with the arithmetic mean is the: （ ）
A:interquartile range
B:variance
C:range
D:standard deviation
答案: standard deviation
2、单选题：Simply by scanning the values in each distribution below, identify the distribution with the smallest standard deviation.（ ）
A:9, 9, 9, 10, 10, 10, 10, 11, 11, 11
B:80, 80, 80, 80, 80, 80, 80, 80, 80, 80
C:7, 8, 9, 10, 11, 12, 13, 14, 15, 16
D:6, 6, 9, 10, 11, 12, 14, 17, 20, 90答案: 80, 80, 80, 80, 80, 80, 80, 80, 80, 80
3、单选题：The most commonly used measure of central location for antibody titers is the:（ ）
A:arithmetic mean
B:geometric mean
C:median
D:mode
答案: geometric mean
4、单选题：Which range characterizes the interquartile range?（ ）
A:From 10th percentile to 90th percentile
B:From 1.96 standard deviations below the mean to 1.96 standard deviations above the mean
C:From 5th percentile to 95th percentile
D:From 25th percentile to 75th percentile
答案: From 25th percentile to 75th percentile
5、单选题：All of the following are measures of dispersion EXCEPT: （ ）
A:median
B:range
C:standard deviation
D:interquartile range
答案: median
第三章 单元测试
1、单选题：Which of the following is not applicable to describe categorical data? （ ）
A:Proportion
B:Rate
C:Mean
D:Ratio
答案: Mean
2、单选题：Which of the following refers to the frequency of a given event during or after a certain time period? （ ）
A:Mean
B:Ratio
C:Proportion
D:Rate
答案: Rate
3、单选题：Which of the following is TRUE? （ ）
A:The ratio can be used to explain the frequency.
B:The frequency is a time-dependent indicator.
C:If the total number of observations is not sufficient, the results should be expressed in relative number.
D:When the rate is computed based on a sample data, it usually should be adjusted according to the composition of the population
答案: When the rate is computed based on a sample data, it usually should be adjusted according to the composition of the population
4、单选题：There are 120 patients with a certain disease, including 114 males and 6 females, accounting for 95% and 5% respectively. The conclusion is （ ）
A:No conclusion can be drawn
B:The susceptibility rates of male and female patients are the same.
C:The disease is easy to get in men.
D:The disease is easy to get in women
答案: No conclusion can be drawn
5、单选题：The crude mortality of malignant tumors in county A is higher than that in County B. After standardization, the standardized mortality of malignant tumors in county A is lower than that in County B. The most likely reason is （ ）
A:High diagnostic level in county A
B:The proportion of the elderly population in the total population in county A is larger than that in County B
C:The proportion of the elderly population in the total population in county A is smaller than that in County B
D:The cancer prevention and treatment work in county A is better than that in County B
答案: The proportion of the elderly population in the total population in county A is larger than that in County B
第四章 单元测试
1、单选题：Which of the following statistical charts applies to a continuous variable （ ）
A:Histogram
B:Scatter graph
C:Bar graph
D:Line graph’
答案: Histogram
2、单选题：Pie charts can be used to describe （ ）
A:the development speed of phenomena
B:the changing trend of phenomena
C:the frequency distribution of phenomena
D:the internal structure of phenomena
答案: the internal structure of phenomena
3、单选题：Which of t
